Swelling current interrupt device

Abstract

A swelling current interrupt device (CID) includes: a battery unit connection terminal configured to be fixed to a pouch; and a lead tab connection terminal configured to be fixed to the pouch and electrically connected to the battery unit connection terminal, wherein any one of the battery unit connection terminal and the lead tab connection terminal is broken by an expansion force of the pouch which is generated when the pouch expands to interrupt the electrical connection between the battery unit connection terminal and the lead tab connection terminal.

What is claimed is: 
     
       1. A pouch cell including a battery unit, a lead tab for connecting the battery unit to a component, and a pouch packaging the battery unit, comprising:
 a swelling current interrupt device (CID) configured to be equipped between the battery unit and the lead tab so as to be broken by an expansion force of the pouch which is generated when the pouch expands, 
 wherein the swelling current interrupt device comprises:
 a battery unit connection terminal being fixed to the pouch; and 
 a lead tab connection terminal being fixed to the pouch, and electrically connected to the battery unit connection terminal, 
 wherein the battery unit connection terminal includes a bent surface part being bent to protrude toward the lead tab connection terminal, and a bonding part being bonded to the lead tab connection terminal and the pouch, 
 wherein the lead tab connection terminal includes a cut part being attached to a lower surface of the bent surface part and a rest part being attached to the pouch, and 
 wherein the cut part has a V-notch which guides a cutting of the lead tab connection terminal.